Specific heat evidence for two-gap superconductivity in ternary-iron silicide Lu${}_2$Fe${}_3$Si${}_5$

Y. Nakajima, T. Nakagawa, T. Tamegai +1

We report low-temperature specific heat studies on single-crystalline ternary-iron silicide superconductor Lu${}_2$Fe${}_3$Si${}_5$ with$T_c$ = 6.1 K down to $\sim T_c/20$. We conf…